Question

In moving a body of
mass up and then down the smooth incline of inclination o, total work done
is (S is length of the plane).
(a) mg sin exS
a) mg (sin 0 - mg cos 0 )
(c) mg cos OxS
(d) zero
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Answer 1

Answer:

zeroooooooooooooooooooo

Answer 2

Correct option is (d)